1. What is a Mass Flow Rate ISP Calculator?

Definition: This calculator determines the mass flow rate of propellant in a rocket engine based on specific impulse, thrust, and gravity.

Purpose: It helps aerospace engineers and rocket enthusiasts calculate the propellant consumption rate for rocket propulsion systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( W \) — Mass flow rate (kg/s)
• \( I_{sp} \) — Specific impulse (seconds)
• \( F \) — Thrust (Newtons)
• \( g \) — Standard gravity (9.81 m/s²)

Explanation: The specific impulse multiplied by thrust gives the total impulse, which when divided by gravity gives the mass flow rate.

3. Importance of Mass Flow Rate Calculation

Details: Accurate mass flow rate calculation is crucial for determining rocket performance, fuel requirements, and burn duration.

4. Using the Calculator

Tips: Enter the specific impulse in seconds, thrust in Newtons, and gravity (default 9.81 m/s²). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is specific impulse (I_sp)?
A: Specific impulse measures how efficiently a rocket engine uses propellant, defined as thrust per unit of propellant flow rate.

Q2: Why is gravity (g) in the formula?
A: The formula converts from weight-based specific impulse (seconds) to mass flow rate (kg/s) using standard gravity.

Q3: What's a typical I_sp value for rocket engines?
A: Chemical rockets typically range from 250-450s, while ion thrusters can reach 3000-5000s.

Q4: How does mass flow rate affect rocket performance?
A: Higher mass flow rates mean more thrust but shorter burn times, requiring optimization for mission requirements.

Q5: Can I use different units?
A: The calculator uses SI units (kg, s, N, m/s²). Convert other units before inputting values.